Best of 2021

A look at how without volcanoes, there would be no life on Earth.

Prof Brian Cox explores our cosmic origins. How did stars bring meaning to the cosmos?

Greta travels through North America on her way to a UN climate conference in Chile.

The extraordinary inside story of the vaccine scientists who took on Covid-19 - and won.

David Attenborough reveals the extraordinary ways in which animals use colour.

Simon Reeve travels through the glorious Lake District and the county of Cumbria.

The revolutionary science finding renewable resources and undiscovered life in sewage.

Stacey Dooley helps people to answer life-changing questions through the power of DNA.

How a few drops of water can cause deserts to bloom and create giant rivers in the air.

Terry Abraham's film of Helvellyn features a low-level flight through its landscape.

Brian Cox looks at our attempts to discover whether we are alone in the universe.

Sir David Attenborough reveals inspiring solutions to help restore our natural world.

Why a primordial, single-cell organism might challenge our concept of intelligent life.

Atlantic grey seals are followed through the year, from courtship to pregnancy and birth.

The astonishing quest to detect and decode the most elusive particle in the universe.

Exploring life in the ocean with cameras designed to withstand the pressures of the sea.

Can psychedelic drugs and psychological support help tackle depression?

BBC wildlife presenters look back at their adventures across Africa.

Are human beings becoming less violent? And if so, why?

Ade sees the damage that climate change is causing, and finds out how we can fight it.

Chris Packham explores his past as he walks a familiar path in the Hampshire countryside.

What are the consequences if the object against which we measure all other things changes?

Wildlife film-maker Gordon Buchanan gets up close and personal with wild cheetahs.

The story of the scientists who created Dolly, the sheep that changed the world.